working on additional unit tests
more unit tests for proxy and a few bugs fixed

the new unit tests uncovered a few small bugs in the proxy, vlan slicer
and rate tracker.  These are fixed and the unit tests can detect them
Merge branch 'additional-unit-tests' into 1.0.2-dev
Merge pull request #7 from ajragusa/1.0.2-dev

additional unit tests and bugs uncovered while writing them